Square baking pan



FIG. 1 is a perspective view of the inventive design for a square baking pan;

FIG. 2 is a top plan view of the FIG. 1 design;

FIG. 3 is a front end elevational view of the FIG. 1 design, the rear end being a mirror image;

FIG. 4 is a side elevational view of the FIG. 1 design, the other side being a mirror image; and,

FIG. 5 is a bottom plan view of the FIG. 1 design. 

The ornamental design for a square baking pan, as shown and described. 